Though developers are interested in building crude oil rail terminals in Portland, the Port of Portland said Tuesday it wouldn’t allow any to go forward until oil train safety concerns are addressed.

"[W]e do not believe that we have sufficient answers to the important questions regarding environmental and physical safety to proceed with any type of development at this time," the port said in a statement. “Our interest will begin to grow once we have the confidence that transportation of crude oil by rail continues to meet all state, federal and local transportation rules and regulations and exhibits a sufficient accident-free record for a sustained period of time.”

Martha Richmond, a port spokeswoman, said the agency has received numerous proposals to develop terminals that would receive crude oil trains but declined to provide details about them. She said the specific proposals are covered by confidentiality agreements.

The port owns three industrial marine terminals on the Willamette River and a fourth on the Columbia River.